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Current status of WLTP-DHC

Current status of WLTP-DHC. Prepared by Japan the 13th DHC group under GRPE/WLTP informal group 5th June 2012 Palais des Nations, Geneva. Table of contents. Progress since last GRPE meeting Summary of Validation1b Profile of WLTC ver.5 Gear Shift Prescription Open Issues Lists

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Current status of WLTP-DHC

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  1. Current status of WLTP-DHC Prepared by Japan the 13th DHC group under GRPE/WLTP informal group 5th June 2012 Palais des Nations, Geneva

  2. Table of contents Progress since last GRPE meeting Summary of Validation1b Profile of WLTC ver.5 Gear Shift Prescription Open Issues Lists Next actions Next meeting

  3. 1. Progress since last GRPE meeting ’11/9 10 11 12 ’12/1 2 3 4 5 6 Validation 1 Test (WLTC Version 2) Validation 1b Test Add new parameter (v*a positive) for cycle modification Validation 2 Test WLTC Version5 WLTC Version4 Cycle Additional data acquisition for LPV Validation 1b Test LPVC* Version2 Concern on “Dynamic” profile Concern for Low Powered Vehicle (LPV) • During 12th DHC meeting @ JRC, • it was agreed to move on to Validation2 • with following conditions. • WLTC version5 • LPVC version2 • Steven 3 gear shift (engine speed basis) Vehicle speed basis Gear shift Exchange the strategy of each method, then modified based on validation result backup Engine speed basis Steven 3

  4. 2.1. Summary of Validation 1b From the viewpoints of drivability, traceability and reproducibility, the following 31 portions are pointed out by India, JRC and Japan. 18 1415 12 16 6 5 8 1 3 17 13 9 2 4 1011 7 30 24 25 22 19 20 26 27 29 21 23 28 31: number of decimal places

  5. 3.2. Profile of WLTC ver.5 Modification points from version4. Red  Applied, Blue  Concern 6 Smoothing 5 1 Smoothing Smoothing 3 2 4 12 km/h 12 km/h 12 km/h 15 Concern 8 12 Concern 9 17 Concern 13 12 km/h Smoothing 7 10 11 12 km/h Smoothing 12 km/h Concern 18 Concern 16 Concern 14

  6. 3.2. Profile of WLTC ver.5 Modification points from version4. Red  Applied, Blue  Concern 22 Concern 19 20 Concern 21 Concern 23 12 km/h 12 km/h 24 Concern Concern 25 30 Concern 27 Concern 26 17 Concern Concern 28 Concern 29

  7. 3.3. Profile of WLTC ver.5 Chi squared value of proposed WLTC v5 is identical to that of WLTC v4

  8. 3.4. Profile of WLTC ver.5 Proposed

  9. 3.5. Profile of WLTC ver.5 • LOW • MIDDLE 95%tile of WWW database is 10 m2/s3 Max. of WLTC v5 is 11.2 m2/s3 95%tile of WWW database is 14 m2/s3 Max. of WLTC v5 is 16.7 m2/s3 • HIGH • Extra-HIGH 95%tile of WWW database is 16 m2/s3 Max. of WLTC v5 is 19.7 m2/s3 95%tile of WWW database is 18 m2/s3 Max. of WLTC v5 is 20.9 m2/s3 The maximum v*a of WLTC ver.5 exceed 95%tile of WWW database

  10. 4. Gear Shift Prescription (Steven3) • Input Parameter • Rated engine power • Rated engine speed • Idling speed • engine speed for short trips • decisive for downshifts, • number of gears • Gear ratios • Test mass of the vehicle • others • Calculations • Determination of usable gears • Lowest gear determination • Initial highest gear determination • Calculation of available power • Determination of driving resistance power • Determination of acceleration power • Determination of highest gear • Gear use starts • Application • Set gear shift information • to drivers aid • Corrections/modifications • gear insertion 1 second before standhill • Prohibit the gear skip • The minimum hold time is 3 s. • set the gear lever to neutral / clutch to engaged • no gearshift, if acc is followed by dec condition • others

  11. 5.1.Open Issues -1 CLOSED CLOSED CLOSED CLOSED 11

  12. 5.2. Open Issues -2 CLOSED 12

  13. 6.Next Actions 13th DHC 64th GRPE 16th DHC 65th GRPE 14th DHC 15th DHC Interim Report of Validation 2 Report to GR Report of Validation 2 Agreement of OIL Data analysis Conducting test Start confirmation test 10th DTP DTP-ICE 11th DTP GTR draft To be discussed Cycle profile, WeightingFactors, Gear shift prescription, LPVC To be confirmed No concern should be observed 13

  14. 7. Next Meetings Next 14th DHC meeting will be set during next DTP meeting in September at JRC. Main agenda itemswill be Validation2 test results from contracting parties WLTC modification Weighting factors of L/M/H/ExH Phases LPVC Gear Shift Points of WLTC (15th DHC meeting will be set around November 2012)

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